Liability car insurance is the part of an auto insurance policy designed to protect you financially when you cause an accident and are legally responsible for another person’s injuries or property damage.

It usually contains two major coverages:

Liability coverage can also help with legal defense expenses when you are sued over a covered accident, subject to the terms of your policy.

Suppose you fail to stop in time and rear-end another vehicle.

If you are legally responsible for the accident, the other driver could have:

• Medical expenses.
• Lost wages.
• A damaged vehicle.
• Other property damage.
• Additional legally recoverable damages.

Your liability coverage can pay eligible costs up to your policy limits.

If the covered damages exceed your available liability insurance, you may be personally responsible for the remaining amount.

This is why liability limits are an important financial decision rather than merely a state registration requirement.

Bodily injury liability can help pay damages arising from injuries you are legally responsible for causing.

Depending on the claim and applicable law, covered damages can include qualifying:

Bodily injury liability generally protects against claims made by people other than the insured driver. Coverage for your own medical expenses is handled through other forms of insurance, which can include personal injury protection, medical payments coverage, health insurance, or another applicable policy depending on the state and circumstances.

Property damage liability pays eligible damages when you are legally responsible for damaging property belonging to someone else.

That can include:

• Another person’s vehicle.
• A fence.
• A garage.
• A building.
• A utility pole.
• A traffic sign.
• Other covered property.

Imagine you lose control of your car, damage another vehicle, and then hit a homeowner’s fence.

Your property damage liability coverage could potentially respond to both types of property damage, subject to the available policy limit and other policy terms.

Liability coverage primarily protects you against claims from other people. It is not designed to pay every expense resulting from an accident.

Your liability limit is the maximum amount your insurer can pay for eligible claims under the applicable portion of the policy.

Auto liability insurance is commonly displayed using split limits.

A hypothetical policy might show:

In a typical split-limit structure, that could represent:

These numbers are hypothetical examples and are not recommendations or state minimum requirements.

Suppose your hypothetical bodily injury limits are $100,000 per person and $300,000 per accident.

If one person has $80,000 in covered injury damages, the per-person limit could potentially be sufficient.

But if one person’s eligible damages total $150,000, your $100,000 per-person limit would create a potential shortfall:

The higher $300,000 per-accident limit does not necessarily increase the $100,000 maximum available for one individual under a split-limit policy.

Some auto policies use a combined single limit, or CSL, instead of separate bodily injury and property damage limits.

With a combined single limit, one overall liability amount applies to eligible bodily injury and property damage arising from a covered accident, subject to policy terms.

For example, a hypothetical $500,000 combined single limit could provide up to that amount across covered bodily injury and property damage rather than dividing protection into three separate numbers.

Most states require drivers or vehicle owners to demonstrate financial responsibility, commonly through auto liability insurance.

However, requirements differ by state.

State rules can determine:

• Minimum bodily injury liability limits.
• Minimum property damage liability limits.
• Whether personal injury protection is required.
• Whether uninsured or underinsured motorist coverage must be offered or carried.
• Whether other proof-of-financial-responsibility options exist.

Because these requirements can change, drivers should verify current rules with their state Department of Insurance, motor vehicle agency, or other applicable state regulator.

A state’s legal minimum establishes the amount required to satisfy applicable financial-responsibility laws. It does not guarantee that the limits are sufficient for a serious crash.

Consider a hypothetical accident causing:

• $120,000 in eligible injury damages.
• $55,000 in property damage.

If a driver has liability limits lower than those eligible damages, the policy can exhaust its available coverage before the entire claim is paid.

The driver could then face personal financial exposure for the remaining amount, depending on the claim and applicable law.

There is no single liability limit that is right for every driver.

Consider:

Drivers with assets or income worth protecting may reasonably consider limits higher than state minimums because liability judgments can exceed the amount available under a basic policy.

Suppose a driver has hypothetical liability limits of:

• $100,000 bodily injury per person.
• $300,000 bodily injury per accident.
• $100,000 property damage per accident.

The driver causes a crash involving two injured people and a damaged vehicle.

Total bodily injury damages in this simplified example equal $160,000, which remains below the hypothetical $300,000 per-accident bodily injury limit.

If one injured person instead had $140,000 of damages, the $100,000 per-person limit could leave a $40,000 potential shortfall even though the combined bodily injury total remained below $300,000.

Liability and collision insurance solve different problems.

If you cause an accident that damages both your vehicle and someone else’s vehicle, liability can address eligible damage to the other person’s car while your collision coverage can address eligible damage to your own vehicle, subject to its deductible and terms.

Comprehensive coverage generally addresses certain non-collision losses involving your own insured vehicle.

Examples can include qualifying losses involving:

• Theft.
• Vandalism.
• Fire.
• Hail.
• Falling objects.
• Animal impacts.

Liability coverage generally does not pay for these losses to your own vehicle.

Your liability insurance protects against damage or injuries you cause to others. Uninsured motorist coverage protects you in qualifying situations when someone else causes an accident but does not have sufficient applicable liability insurance.

Depending on state law and your policy, uninsured or underinsured motorist protection can involve:

• Bodily injury.
• Underinsured driver claims.
• Property damage in jurisdictions or policies where that coverage is available.

Requirements and available forms of uninsured or underinsured motorist coverage vary by state.

The phrase liability-only car insurance usually describes a policy that carries liability coverage without optional physical damage protection such as collision and comprehensive.

Depending on state requirements, however, a so-called liability-only policy may still include or offer other coverages such as:

• Personal injury protection.
• Medical payments.
• Uninsured motorist coverage.
• Underinsured motorist coverage.

“Liability-only” is therefore an informal description rather than a guarantee that liability is literally the only coverage appearing on the policy.

Some owners of older or low-value vehicles consider dropping collision and comprehensive while keeping required liability coverage.

A useful decision involves comparing:

Dropping collision or comprehensive does not reduce your need for liability protection. The value of your own vehicle has little to do with how much injury or property damage you could cause to someone else.

Yes.

If your vehicle is financed or leased, the lender or leasing company can require physical damage coverage to protect its financial interest in the vehicle.

This commonly includes:

• Collision coverage.
• Comprehensive coverage.

State law may require liability insurance, while the financing contract separately requires collision and comprehensive.

This is one reason a driver cannot always choose liability-only insurance simply because it meets state financial-responsibility rules.

Standard personal auto liability coverage commonly does not use a deductible in the same way collision and comprehensive coverage do.

For example, if a covered property damage liability claim is $20,000 and falls within your available limits, you typically would not subtract a $500 collision deductible from the other person’s liability claim.

Your own collision or comprehensive claim may have a deductible, but liability coverage works differently.

Always check your policy because specialized arrangements can vary.

If the eligible damages from an accident exceed your available liability limit, the insurance company generally does not become responsible for unlimited amounts simply because you purchased a policy.

The remaining amount can become your personal responsibility, subject to settlement, litigation, state law, and other applicable insurance.

Potential consequences can include claims against:

• Personal savings.
• Income, subject to applicable law.
• Other non-exempt assets.
• Additional liability insurance if available.

For drivers with meaningful assets or income, this potential exposure is one reason to consider limits above minimum requirements.

A personal umbrella policy can provide additional liability protection above qualifying underlying auto and homeowners or renters liability policies.

Suppose a covered auto accident produces $700,000 in eligible liability damages and your underlying auto policy provides a hypothetical $300,000 applicable liability limit.

An appropriately structured umbrella policy could potentially respond to eligible excess liability, subject to required underlying limits, exclusions, and the umbrella policy’s own terms.

Auto liability premiums vary because insurers evaluate many different factors subject to state insurance law.

Pricing can be influenced by factors such as:

Increasing liability limits can increase your premium, but the extra cost may be relatively modest compared with the additional financial protection in some cases.

Actual pricing varies substantially by insurer, driver, vehicle, and state, so compare quotes using the same coverage limits.

Comparing only the premium can be misleading if the quotes provide different liability limits.

Liability car insurance protects you financially when you are legally responsible for injuries or property damage caused to other people in a covered auto accident. Bodily injury liability addresses qualifying injury claims, while property damage liability addresses damage to other vehicles and property.

Liability coverage generally does not repair your own vehicle or pay your own medical bills. Collision, comprehensive, personal injury protection, medical payments, and uninsured motorist coverage address different risks.

Most importantly, do not assume your state’s minimum liability requirement is automatically the right amount for you. Compare the potential cost of a serious accident with your policy limits, financial assets, and budget. Higher liability limits or an umbrella policy can provide additional protection when the potential financial consequences of an accident exceed basic coverage.

• National Association of Insurance Commissioners, Auto Insurance consumer guidance.
• National Association of Insurance Commissioners, Auto Insurance Shopping and Consumer Resources.
• State Departments of Insurance for state-specific auto liability requirements and consumer guidance.
• State motor vehicle agencies for applicable financial-responsibility and vehicle registration requirements.